Lost at Sea: The Search for Longitude

Description:
This site is a companion to a Public Broadcasting Service (PBS) NOVA program that tells the story of how British clockmaker John Harrison solved the problem of calculating longitude and thus "discovered the key to navigating on the open seas." The site provides a program transcript, information about secrets of ancient navigation and the current Global Positioning System (GPS), and thoughts from scientists about recent scientific challenges. Also includes a teacher's guide.